This version of the documentation is archived and no longer supported. View thecurrent documentationto learn how toupgrade your version of MongoDB server. Note For details on specific operator, including syntax and examples, click on the specific operator to go to its reference page. ...
Learn about logical query operators in MongoDB. The $and, $not, $nor, and $or operators help you build complex queries based on logical conditions.
MongoDB $or operator with another field If we want to fetch documents from the collection "testtable" which containing the value of "date_of_join" is "16/10/2010" and the value of "age " either 19 or 22 or 23, the following mongodb command can be used : >db.testtable.find({"da...
有关特定运算符的详细信息,包括语法和示例,请单击特定运算符以转到其参考页。 名称 描述 $and 使用逻辑AND连接查询子句,返回与这两个子句条件匹配的所有文档。 $not 反转查询表达式的效果,并返回与查询表达式_不_匹配的文档。 $nor 用逻辑NOR连接查询子句,返回所有不能匹配这两个子句的文档。
MongoDB PostgreSQL Apache Cassandra Apache Gremlin Table Download PDF Save Add to Collections Add to Plan Share via Facebookx.comLinkedInEmail Print Article 27/02/2024 2 contributors Feedback In this article Understanding logical (AND, OR and NOT) operators ...
Stream your PostgreSQL, MySQL or MongoDB databases anywhere, fast. mysql streaming mongodb replication postgresql event source logical cdc Updated Jan 15, 2024 JavaScript blind-oracle / psql-streamer Star 58 Code Issues Pull requests Stream database events from PostgreSQL to Kafka events json...
MongoDB可以使用除geoHaystack索引之外的所有索引来支持$or子句。 $not和正则表达式 如果$or包含$text查询,则$or数组中的所有子句必须由索引支持。这是因为$text查询必须使用索引,而$or只能在索引支持其所有子句的情况下使用索引。如果$text查询不能使用索引,则查询将返回一个错误。
variety of sources. This includes web servers, legacy systems, SQL databases, and devices and applications that generate jSON messages or text-based files. You can also deliver data to the Hadoop Distributed File System, the MapR Distributed File System, Elasticsearch, MongoDB, Apache Kafka, and...
NoSQL query NoSQL query documentation Microsoft Copilot for Azure in Cosmos DB (preview) Clauses Working with JSON Subquery Joins Arrays and objects Keywords Constants Scalar expressions Computed properties Operators Equality and comparison operators ...
The mongo Shell MongoDB CRUD操作 MongoDB聚合 MongoDB数据模型 MongoDB事务 MongoDB事务 MongoDB索引 MongoDB安全 Change Streams变更流 MongoDB复制 MongoDB分片 MongoDB管理 MongoDB存储 MongoDB参考 运算符 查询与映射运算符 比较查询运算符 逻辑查询运算符 $and $not $nor $or 元素查询运算符 评估查询运算符...